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Answer :- correct option is A
operon is a collection of gene that is controlled by single promoter but in eukaryotes it is not present as each gene has its own promoter
B) repression's are present in both. Their work is to bind to specific DNA sequence and stop transcription
C) RNA polymerase is present in both
D) transcription factors are factors present in eukaryotes. That is why in comparison to prokaryotes they are more complex.it help in altering cell type and growth pattern which in useful for complexity.
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